Obs. : 2008-09-15 Planet Ly alpha Mercury 3.385e+11 Venus 3.385e+11 Earth 3.352e+11 Mars 3.385e+11 Jupiter 3.389e+11 Saturn 3.284e+11 Uranus 3.355e+11 Neptune 3.364e+11 Pluto 3.416e+11